https://bugzilla.wikimedia.org/show_bug.cgi?id=23741

Happy-melon <[email protected]> changed:

           What    |Removed                     |Added
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           Keywords|                            |schema-change
                 CC|                            |[email protected]

--- Comment #2 from Happy-melon <[email protected]> 2010-06-01 12:14:10 UTC 
---
Have you encountered this in practice?  I would expect this only to occur if
the user_properties table is shared; and it could be resolved by not sharing
said table.  Of course, that introduces its own problems vis having to set
preferences on each wiki separately.  Perhaps the user_properties table needs a
up_wiki field which is NULL or '*' for settings which should apply to all
wikis, and can contain a wiki name for properties which should apply only to
that wiki.  But this would only be necessary for wikis using shared tables; it
should be implemented in a different fashion for wikis using CentralAuth, which
(if done properly) should avoid having to do a schema change on the
hundred-million-row enwiki user_properties table...

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